KR101454204B1 - Pulsating pressure supply apparatus, method, virtual blood pressure generator and test method for sphygmomanometer using elastic body - Google Patents

Abstract

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a variable pressure supply device using an elastic body, a method, a virtual blood pressure generator, and a blood pressure monitor performance test method, and more particularly, And a blood pressure monitor performance test method using the virtual blood pressure generator.
The variable pressure supply device, method, virtual blood pressure generator, and sphygmomanometer performance test method using the power device and the elastic body are as follows. First, since the power device plays a role of a pressure source, the structure is simple, There is an effect of lowering the cost. Secondly, since the structure of the variable pressure supply device is simple, the leakage point is reduced, and thus the leakage risk is reduced. Third, various variable pressures can be supplied by various combinations of power unit and elastic body. Fourthly, there is an effect that a soft pressure pattern can be provided by the elastic force of the elastic body.

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a variable pressure supply device using an elastic body, a method, a virtual blood pressure generator, and a performance testing method for a blood pressure monitor,

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a variable pressure supply device using an elastic body, a method, a virtual blood pressure generator, and a blood pressure monitor performance test method, and more particularly, And a blood pressure monitor performance test method using the virtual blood pressure generator.

BACKGROUND OF THE INVENTION [0002] Apparatuses for supplying variable-sized cyclic variable pressures have been used in a wide range of industries. For example, when a liquid fuel is supplied from an air conditioner mounted in a vehicle, a liquid fuel in a plant and a fuel cell, a fuel injected from an engine, an ink jet nozzle (particularly, a device using a printing process of metal nano- , A variable pressure supply device is required when using various hydraulic driving devices. In particular, it is a device used when a virtual blood pressure is generated for a performance test of a blood pressure monitor.

Figs. 1A and 1B are schematic diagrams showing a conventional concept for supplying variable pressure. Fig. As shown in FIGS. 1A and 1B, the conventional concept can be roughly divided into two. First, a variable pressure can be supplied by a combination of a pressure source supplying a constant pressure and a regulator capable of limiting the pressure. Second, a variable pressure can be supplied by a combination of a plurality of pressure sources supplying a constant pressure and a plurality of solenoid valves performing valve driving in response to an electric signal.

When a variable pressure is supplied by a combination of a pressure source for supplying a constant pressure and a regulator capable of restricting the pressure, it is advantageous that the pressure change is smooth and various pressures can be supplied. However, the point is that the equipment is expensive, the structure is complicated, it can only be limited by the regulator, it is difficult to raise the pressure, it is difficult to maintain the accurate pressure, and there is a risk of leakage.

When a variable pressure is supplied by a combination of a plurality of pressure sources for supplying a constant pressure and a plurality of solenoid valves for performing valve driving in response to an electric signal, it is advantageous in that it can be driven with an electrical signal. However, since a plurality of pressure sources must be installed, the equipment is expensive, the structure is complicated, the variable pressure is limited because the fluid flow is completely closed or completely heated, the pressure pattern is not smooth, The drawback is that there is a limit to the steep point, the ambient temperature and the fluid temperature, and the use frequency is 30,000 to 30,000 times depending on the moving iron core.

Japanese Patent Application No. 10-0644751 discloses an active servo control system having flow rate control means for controlling the supply flow rate of compressed air by varying the opening angle of an on-off valve provided therein according to a control signal. However, the structure is complicated, the pressure can only be limited, the upward pressure is difficult, and the difficulty in maintaining accurate pressing force is not overcome.

Patent No. 10-0974742 provides an integral pressure-regulating actuator assembly in a hydrogen supply system of a fuel cell vehicle. Here, it is pointed out that the conventional hydrogen supply system uses a pressure regulator and a solenoid valve to generate a large number of leakage points. However, as a countermeasure against this problem, a separate fault mode (Limp Home Mode) which enables emergency operation when the fuel cell system is shut down due to a hydrogen leak is constituted by a combination of a bypass filter and a start / stop solenoid valve , And the above problem still existed.

Particularly, in the virtual blood pressure generator for performance test of the blood pressure monitor, the publication 10-2008-0010530 provides a variable pressure using the conventional concept, and the problem still exists.

Therefore, the simple configuration minimizes the risk of leakage, is economical, is not limited to variable pressure, can provide a variety of pressure patterns (especially high frequency pressure patterns), is pressure sensitive, is not sensitive to fluid or ambient temperature A variable pressure supply with low heat generation is needed.

Patent No. 10-0644751 Patent Document 1: Published publication 10-2008-0010530

Accordingly, the present invention has been made to solve the above-described problems.

A first object of the present invention is to provide a variable pressure supply device that supplies various types of periodic pressures to an output end, comprising a variable pressure supply device that can be constructed with a simple structure and a low cost by using an elastic body and a power device for pressing the elastic body .

A second object of the present invention is to provide a variable pressure supply method for supplying various types of periodic pressures to an output stage by providing a simple structure and a method of supplying variable pressure at low cost by using a power unit for pressing the elastic body I have to.

A third object of the present invention is to provide a virtual blood pressure generator for testing the performance and accuracy of a blood pressure monitor, which can be constructed with a simple structure and a low cost by using an elastic body and a power unit for pressing the elastic body There is.

A fourth object of the present invention is to provide a blood pressure monitor performance test method for testing or correcting a blood pressure monitor by comparing an output pressure and a pressure value measured by a blood pressure monitor using a virtual blood pressure generator configured by using an elastic body and a power device for pressing the same I have to.

A first object of the present invention is to provide an electric or hydraulic power unit in which a variable power is generated; A piston to which a rear end portion is connected to the power unit, a variable power is supplied to linearly reciprocate the piston; A cylinder positioned at one end of the power unit and having a piston therein, the cylinder being saturated with a fluid; A pressing plate which is pressurized or depressurized by the piston and which is formed inside the cylinder; At least one elastic body configured inside the cylinder and configured to buffer the variable power transmitted to the pressure plate through the pressure plate to form a buffer pressure inside the cylinder; And a pressure transfer pipe connected at one end to the cylinder and connected at the other end to the output end, the inside of which is saturated with fluid and a buffer pressure is transmitted to the output end.

In addition, the output end may be a nozzle structure including a first orifice at the end, and may include a fluid supply pipe for supplying the fluid to maintain the saturated state of the fluid in the pressure transfer pipe.

Further, a one-way valve, in which the flow rate of the fluid is regulated, may be further disposed between the fluid supply pipe and the pressure transmission pipe.

A first sensor unit for detecting a cushioning pressure formed in an output terminal or a pressure transmission pipe; And a control unit for adjusting the variable power of the power unit so that the cushioning pressure has a preset pressure value or a pressure pattern.

In addition, the elastic body is made of a synthetic resin material having elasticity, and can constitute a space inside and can include a fluid in the space.

Further, the elastic body may be constituted by at least one coil spring, one side of the coil spring may be connected to the pressing plate pressed by the first piston, and the other side of the coil spring may be welded to one side of the first cylinder.

In addition, the elastic body can be constituted by a shock absorber composed of a combination of a spring and an oil damper.

A second object of the present invention is to provide a power supply applying step of applying power to a power unit; The piston is connected to the power unit and is supplied with variable power to the piston, the piston is located in the linear motion direction of the piston, and the pressure plate provided in the cylinder saturated with the fluid is pressed or released, A pressure supplying step of transmitting power; A buffering step of transmitting a variable power transmitted to the pressing plate to the elastic body and buffering the transmitted variable power to form a buffering pressure in the fluid saturated inside the cylinder; And a pressure output step in which the buffered pressure buffered in the elastic body is transmitted to an output end through a pressure transfer pipe saturated with the fluid.

At this time, the elastic body can be configured as mentioned in the variable pressure supply device.

A pressure detecting step of detecting a cushioning pressure in a first sensor unit for detecting a cushioning pressure formed on an output terminal or a pressure transmission pipe; A control step of controlling the variable power of the power unit to adjust the cushioning pressure to a preset pressure value or a pressure pattern; a control step of controlling the variable power of the power unit or changing the elastic body; And repeating the above steps so that the buffer pressure has a preset pressure value or pressure pattern.

A third object of the present invention is to provide a virtual blood pressure generator for testing the performance and accuracy of a blood pressure monitor, comprising: the variable pressure supply device; And a model arm provided at an output end of the variable pressure supply device.

A second sensor unit connected to the model arm for detecting the output pressure of the model arm applied by the buffering pressure formed at the output end of the variable pressure supply unit; And a second control unit for controlling the variable power of the power unit, which is an arrangement of the variable pressure supply unit, such that the output pressure has a preset pressure value or pressure pattern.

At this time, the model arm is formed of a resilient synthetic resin material and has at least one elastic tube made of a synthetic resin material, the fluid inlet of the tube is opened, and the terminal end is closed Can be configured.

Further, the output pressure is divided into a virtual diastolic blood pressure corresponding to diastolic blood pressure of the human blood pressure and a virtual systolic blood pressure corresponding to the systolic blood pressure of the human blood pressure, and the virtual diastolic blood pressure is controlled by variable power supply The hypothetical systolic blood pressure is generated when the power unit supplies the variable power, and the variable power is applied to the cushioning pressure which is formed by buffering in the elastic body constituting one component of the variable pressure supply device And the output pressure is at least one virtual systolic blood pressure in one cycle.

A fourth object of the present invention is to provide a method and a device for connecting a variable pressure supply device and a model arm to each other and applying power to the variable pressure supply device to apply a pressure A supply step; An output pressure detecting step of detecting an output pressure of the model arm at a second sensor unit connected to the inside of the model arm; An output pressure correction step of controlling the variable power of the power unit, which is one configuration of the variable pressure supply unit, so that the output pressure of the model arm has a predetermined pressure value or a pressure pattern, or changing an elastic body constituting one configuration of the variable pressure supply unit; And a test step of connecting the model arm to the blood pressure monitor and comparing or measuring the blood pressure value measured by the blood pressure monitor and the output pressure of the model arm to test or correct the blood pressure monitor.

Further, the output pressure is divided into a virtual diastolic blood pressure corresponding to diastolic blood pressure of the human blood pressure and a virtual systolic blood pressure corresponding to the systolic blood pressure of the human blood pressure, and the virtual diastolic blood pressure is controlled by variable power supply The hypothetical systolic blood pressure is generated when the power unit supplies the variable power, and the variable power is applied to the cushioning pressure which is formed by buffering in the elastic body constituting one component of the variable pressure supply device And the output pressure is at least one hypothetical systolic blood pressure in one cycle.

As described above, the present invention has the following effects.

First, since the power unit plays a role of a pressure source, the structure is simple and the cost is lower than that of the conventional technology.

Secondly, since the structure of the variable pressure supply device is simple, the leakage point is reduced, and thus the leakage risk is reduced.

Third, various variable pressures can be supplied by various combinations of power unit and elastic body.

Fourth, there is an effect that a soft pressure pattern can be provided by the elastic force of the elastic body.

Fifth, as compared with the variable pressure supply apparatus using a solenoid valve, since the temperature rise inside is not steep, there is an effect that the change in temperature applied to the fluid is not large.

Sixth, compared with the variable pressure supply device using a solenoid valve, the number of usable times can be increased since the device can be used until the failure due to the elastic fatigue of the elastic body caused by repeated use occurs.

FIG. 1A is a schematic diagram showing a conventional concept for supplying a variable pressure, FIG.
1B is a schematic diagram showing a conventional concept for supplying variable pressure,
FIG. 2 is a block diagram showing a flow of pressure in a variable pressure supply apparatus according to an embodiment of the present invention. FIG.
FIG. 3A is a conceptual diagram showing a non-compressor of a variable pressure supply device according to an embodiment of the present invention,
FIG. 3B is a conceptual diagram illustrating a compressor of a variable pressure supply apparatus according to an embodiment of the present invention. FIG.
4 is a conceptual diagram illustrating an output unit provided with a nozzle according to an embodiment of the present invention;
5 is a flowchart of a variable pressure supply method according to an embodiment of the present invention;
FIG. 6 is a block diagram showing a flow of pressure in the virtual blood pressure generator according to the embodiment of the present invention,
FIG. 7 is a graph of time of actual blood pressure,
8 is a flowchart of a blood pressure monitor performance test method according to an embodiment of the present invention.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings. In the following detailed description of the operation principle of the preferred embodiment of the present invention, a detailed description of known functions and configurations incorporated herein will be omitted when it may unnecessarily obscure the subject matter of the present invention.

The same reference numerals are used for portions having similar functions and functions throughout the drawings. Throughout the specification, when a part is connected to another part, it includes not only a case where it is directly connected but also a case where the other part is indirectly connected with another part in between. In addition, the inclusion of an element does not exclude other elements, but may include other elements, unless specifically stated otherwise.

<Variable pressure supply device>

&Lt; Example 1 >

FIG. 2 is a block diagram showing the flow of pressure in a variable pressure supply apparatus according to an embodiment of the present invention, FIG. 3 (a) is a conceptual diagram showing a non- compressor of a variable pressure supply apparatus according to an embodiment of the present invention, 3b is a conceptual diagram showing a compressor of a variable pressure supply device according to an embodiment of the present invention. 2, 3a and 3b, the variable pressure supply device 10 includes an electric or hydraulic power unit 100, a piston rod 120, a piston 122, a cylinder 140, a pressure plate 160 An elastic body 180, a pressure transmission pipe 142, a fluid 14, an output end 144, a first sensor unit 500, and a control unit 520. Each component will be described below.

The electric or hydraulic powered device 100 includes known drive devices such as electric motors, hydraulic motors and hydraulic cylinders. The detailed configuration of the present power unit 100 is not related to the gist of the present invention, and is known, and therefore a description thereof will be omitted. However, it can output rotational motion and output linear motion. Each differently powered device 100 imposes a linear motion on the piston rod 120 in other ways known in the art according to the different output schemes. Eventually, variable power is generated.

The piston rod 120 may be made of steel, synthetic resin, or the like, and is preferably made of steel to provide stable power for a long period of time. One side is connected to the power unit 100, and the other side is connected to the piston 122. Connection can be made by fastening mechanism such as fastening groove, bolt, nut or rivet, or by welding or bonding.

The piston 122 may be made of steel, synthetic resin, or the like, and may be manufactured to fit into the inner wall of the cylinder 140 in a cylindrical shape. Between the cylinder 140 and the piston 122, lubricating means for preventing friction during reciprocation may be provided. And one surface thereof is connected to the piston rod 120 to receive the variable power of the power unit 100 and to press the pressing plate 160 located in the cylinder 140.

The cylinder 140 is made of steel, synthetic resin, or the like, and has a cylindrical shape. A piston 122, a pressure plate 160, a fluid 14, and an elastic body 180 may be included in the cylinder 140. A pressure transmission pipe 142 may be directly connected to one side of the cylinder 140 and an orifice may be provided therebetween. One side of the elastic body 180 is contacted to the other side of the cylinder 140 and a reaction of variable power supplied from the power unit 100 is applied to cause contraction of the elastic body 180.

The pressing plate 160 may be made of steel, synthetic resin, or the like, and may be formed into a plate that fits inside the cylinder 140. It is apparent to those skilled in the art that leakage preventing means such as o-rings and rubber seals may be included between the pressing plate 160 and the cylinder 140 to prevent leakage of the fluid 14. [ One surface of the pressing plate 160 is in contact with one side of the elastic body 180, and the pressing plate 160 is directly pressed by the piston 122. That is, means for precisely and efficiently pressing the elastic body 180 while preventing leakage of the fluid. At this time, the piston 122 and the pressure plate 160 may not be integrally connected but may be configured separately.

The elastic body 180 may be made of a spring type, a damper type, a synthetic resin having an elastic force, and a synthetic resin having an elastic force on the outside, and the inside may be made of a material which is saturated with a compressible or incompressible fluid. The elastic body 180 may be disposed inside the cylinder 140, one side may contact one side of the cylinder 140, and the other side may be in contact with the pressing plate 160. At this time, when the elastic body 180 is made of a metal such as a spring type or a damper type, it can be welded to the cylinder 140 and the pressing plate 160. As a result, the variable power supplied from the power unit 100 is buffered to form a buffering pressure in the cylinder 140. Young's Modulus and Elastic Fatigue are related to the elastic body 180.

Young's modulus can be divided into the static elastic modulus and the dynamic elastic modulus. The former refers to the elastic modulus calculated from the stress-strain curve obtained by the static load, and the latter refers to the elastic modulus calculated from the resonance frequency or the wave propagation velocity. In the present invention, the static elastic modulus is more significant than the dynamic modulus. The Young's modulus represents the magnitude of the stress depending on the unit strain, which means the slope in the stress-strain curve. In other words, elastomers having a higher Young's modulus require greater stress for the same strain, while elastomers having a lower Young's modulus require less stress for the same strain. In selecting the elastic body 180 in the present invention, the Young's modulus can serve as two factors. May be an element to be considered when first determining the degree to which the elastic body 180 contracts in accordance with the pressure supplied by the power unit 100. [ Second, the larger the Young's modulus, the faster the oscillation period of the elastic body 180 becomes, so it can be considered when determining the oscillation period of the elastic body 180. The oscillation period of the elastic body 180 is finally the oscillation period of the output pressure output from the output stage 144. [ Therefore, it is preferable to use an elastic body 180 having a high Young's modulus when a high-frequency pressing change is required, and to use an elastic body 180 having a low Young's modulus when a low-frequency pressing change is required. In this case, when the shock absorber and the spring are used in an overlapping manner, the change speed of the elastic body of the compressor and the non-compressor may be different.

Elastic fatigue refers to the property that when an elastic body is repeatedly stressed or removed, its strength is lowered and eventually destroyed. In this case, the difference between the upper and lower limits of the stress is an element that governs the number of repetitions until failure in a certain stress range. The elastic fatigue constant value varies depending on which elastic body 180 is taken in the present invention and the range of the stress is determined in accordance with the pressure supplied from the power unit 100. Therefore, . At this time, in the case of the elastic body 180 formed by the overlapping production of the rubber material, the elastic fatigue can be caused early compared with the elastic body 180 of the single material (Korean Concrete Institute, Shear Fatigue Characteristics of Bearing, 2008). The physical properties, size, shape, and driving range of the elastic body 180 should be selected in accordance with the characteristics of the field in which the present invention is used based on these factors. In addition, the type of the elastic body 180 can be changed through feedback in accordance with the pressure value and the pressure pattern predetermined by the user.

The pressure transmission pipe 142 may be made of steel, synthetic resin, or silica. And may have a cylindrical tubular shape having a space in which the fluid 14 exists. One side of the pressure transmission pipe 142 is connected to the cylinder 140 and the other side is connected to the output end 144. The internal space of the pressure transmission pipe 142 can be saturated with the fluid 14. At this time, the fluid 14 is preferably an incompressible fluid. An incompressible fluid is a fluid that can assume that its volume does not change during compression, and typically includes a liquid or a particularly low velocity stream of gas.

The output stage 144 may be made of steel, synthetic resin, or the like. One side may be connected to the pressure transmission pipe 142, and the other side may be closed. At this time, the output stage 144 may be connected to another object to be pressed, or may itself form a object to be pressed. Also, the output stage 144 may include an output cylinder, an output piston, and an output piston rod to convert the variable power generated by the power unit 100 into a periodic linear motion and output the cyclic linear motion. In addition, in the virtual blood pressure generating device to be discussed below, a model arm can be configured at the output stage 144.

The first sensor unit 500 may be configured as an electronic pressure sensor that converts a change in the pressure of the fluid 14 into an electric signal in the pressure reducing element and outputs the electric signal as an electric signal corresponding to the pressure. The type of the electronic pressure sensor can be determined by whether the fluid 14 is corrosive or noncorrosive, whether the pressure reference is at atmospheric pressure or arbitrary pressure, and classified according to the shape of the pressure port. In the present invention, the mechanical pressure sensor does not output pressure information as an electric signal, which is undesirable in the present invention. The first sensor unit 500 may sense the pressure information of the fluid 14 in at least one of the cylinder 140, the pressure transmission pipe 142, and the output terminal 144 and convert the pressure information into an electric signal. The electric signal generated by the first sensor unit 500 is transmitted to the control unit 520 at any time.

The control unit 520 controls the pressure of the fluid 14 in at least one of the cylinder 140, the pressure transmission pipe 142 and the output terminal 144 through the electric signal generated by the first sensor unit 500 , The sensed pressure information can control the power unit 100 in accordance with the pressure value and the pressure pattern preset by the user. This can be done at the same time as the above-mentioned change of the elastic body 180, so that the variable pressure supply device 10 that outputs the pressure value and the pressure pattern satisfactory to the user can be constituted.

&Lt; Operation relationship of Embodiment 1 >

2, 3a, and 3b, the variable pressure supply device 10 is configured such that power is applied to the power unit 100 to generate variable power, and the generated variable power is transmitted to the piston (not shown) through the piston rod 120 122. The piston 122 presses the pressure plate 160. Since the pressing plate 160 is connected to the elastic body 180, the elastic body 180 is pressed and contracted according to the original Young's modulus. At this time, since the volume of the cylinder 140 is reduced and the configuration of the cylinder 140, the pressure transmission pipe 142, and the output stage 144 forms a closed space and the fluid 14 is saturated inside, The pressure of the fluid 14 is increased. As a result, at the output stage 144, the buffer pressure of the form that is higher than the background pressure that is output first is outputted. At this time, at the output stage 144, a pressure change slightly softer than that of the pressure power generated by the power unit 100 is shown. This is due to the buffering effect of the elastic body 180. This is called buffer pressure.

When the pressure of the piston 122 is terminated and the pressing plate 160 is not pressed any further, the volume of the cylinder 140 is increased by the elastic force of the elastic body 180, that is, the returning force. Accordingly, the pressure of the fluid 14 is reduced, and finally, the output 144 outputs a pressure lower than the previous high pressure. At this time, the output 144 does not immediately output a background pressure, but a slight pressure change is observed, and a vibration movement having a period corresponding to the Young's modulus of the elastic body 180 is performed. This is due to the buffering effect of the elastic body 180. At this time, when the shock absorber is combined with the spring and the oil damper, the above vibration motion sharply decreases and the pressure change gradient of the compressor and the non-compressor is different.

&Lt; Example 2 >

4 is a conceptual diagram illustrating an output unit provided with a nozzle according to an embodiment of the present invention. 4, the variable pressure supply device 10 according to the second embodiment includes a nozzle 300 having a first orifice 320 at its output end, a fluid supply pipe 340 and a one-way valve 360 Lt; / RTI &gt;

The first orifice 320 is formed by inserting a smaller diameter pipe in the middle of the output end 144. The first orifice 320 is preferably cylindrical and is a device for adjusting the flow rate, implementing a low pressure to form a pressure gradient, or to increase the velocity of the fluid 14.

The nozzle 300 is characterized in that the first orifice 320 is formed at the end of the output stage 144 and is formed as an output stage 144 and ejects the fluid 14 according to the output pressure. In this case, when the size of the nozzle 300 is nano-sized, it is important to determine how much the output pressure can be increased. Therefore, in the case of a variable pressure supply device based on a conventional pressure source, it is difficult to achieve the object of the nano nozzle 300. However, the present invention can achieve the object of the present invention even in the case of the nano nozzle 300. [

The fluid supply pipe 340 is provided at one side of the output terminal 144 or the pressure transmission pipe 142. And serves to immediately charge the fluid 14 discharged from the nozzle 300. Otherwise, it is difficult to achieve the desired output cushioning pressure by the pressure drop. A one way valve 360 is provided between the fluid supply pipe 340 and the output terminal 144 or the pressure transmission pipe 142 to prevent a hydraulic pressure drop due to the flow of the fluid 14.

Way valve 360 is provided between the fluid supply pipe 340 and the output end 144 or between the pressure transmission pipe 142. The one-way valve 360 may be formed in the form of a valve plate made of silicon or a synthetic resin, or may be of a check valve type.

&Lt; Operation relationship of Embodiment 2 >

The second embodiment changes only the output mode of the output stage 144 in the operating relationship in the first embodiment. The nozzle 300 is connected to the output stage 144 so that the buffer pressure is output in the form that the fluid 14 is periodically injected from the nozzle 300 by the variable power supplied by the power unit 100. [ The internal pressure of the fluid supply pipe 340 is equal to or higher than the cushioning pressure so that the fluid 14 can be filled in the output stage 144 automatically at the same time as the fluid 14 is injected Fluid 14 can be saturated with pressure. This is because a pressure gradient occurs in the one-way valve 360 at the same time as the cushioning pressure drops and movement of the fluid 14 may occur.

Embodiment 2 can be used in a practical industry where nozzles are required to be injected, and can be used in a metal nanoparticle printing technique used in a metal nano ink printed circuit board, especially in a recent nanostructure patterning method.

&Lt; Variable pressure supply method >

5 is a flowchart of a variable pressure supply method according to an embodiment of the present invention. 5, the variable pressure supply method according to an embodiment of the present invention includes a power application step S10, a pressure supply step S20, a buffering step S30, a pressure output step S40, Step S50, control step S60, and repetition step S70.

In power application step S10, power is supplied to the power unit 100 to generate variable power.

In the pressure supply step S20, variable power is supplied to the piston rod 120 connected to the power unit 100, variable power is transmitted by the piston 122 connected to the piston rod 120, and eventually the piston 122 The variable power is supplied to the pressing plate 160 while the pressing plate 160 is being pressed or released.

In the buffering step S30, variable power is supplied to the elastic body 180 connected to the pressing plate 160 by the variable power supplied to the pressing plate 160, and the elastic body 180 is contracted by the variable power The variable power is buffered. As a result, the volume inside the cylinder 140 changes at this stage, and a buffering pressure is formed in the fluid 14.

In the pressure output step S40, the buffer pressure formed on the fluid 14 is supplied to the output stage 144 through the pressure transfer pipe 142. [ As a result, a buffering pressure is formed at the output stage 144, which has a pattern with a smooth change different from the variable power input by the elastic body 180. The return force and the oscillation period upon return vary depending on the Young's modulus and the type of the elastic body 180. This is attributed to the change slope of the buffer pressure, the oscillation period of the buffer pressure, and the like.

In the pressure detecting step S50, the buffering pressure is detected by the first sensor unit 500 detecting the buffering pressure formed at the output terminal or the pressure transfer pipe. And converts the detected buffer pressure into an electric signal and transmits the electric signal to the controller 520.

In the control step S60, the variable power of the power unit 100 is controlled or the elastic body is changed to a desirable elastic body in order to adjust the buffering pressure to a predetermined pressure value or pressure pattern.

In the repeating step S70, the above steps are repeated so that the buffer pressure has a predetermined pressure value or pressure pattern. As a result, the buffer pressure having a constant size and pattern is supplied.

<Virtual blood pressure generator>

6 is a block diagram showing the flow of pressure in the virtual blood pressure generator according to the embodiment of the present invention. 6, the virtual blood pressure generating device 8 includes the variable pressure supply device 10, the model arm 800, the second sensor portion 820, and the second control portion 860 described above.

The model arm 800 may be formed of an elastic synthetic resin material, and a predetermined cylindrical space may be formed inside the model arm 800. A synthetic resin material having elasticity or silicone At least one cylindrical tube 840 may be provided. The fluid inlet of the cylindrical tube 840 may be open and the terminating end closed and the fluid inlet of the cylindrical tube 840 may be connected to the output end 144 of the variable pressure supply 10 to receive a cushioning pressure have. A second orifice is formed between the model arm 800 and the output end 144 to control the amount and flow of the fluid saturated in the model arm 800. The model arm (800) can output a slight change in the buffer pressure according to the shape and material of the model arm (800), which is called the output pressure.

The second sensor unit 820 is constituted by the above-mentioned general pressure sensor and can detect an output pressure which is installed in the model arm 800 and outputted to the model arm 800. [ The second control unit 860 can control the power unit so as to match the output pressure detected by the second sensor unit 820 and the variable power of the power unit to the predetermined pressure value or pressure pattern .

7 is a graph of time of actual blood pressure. As shown in Fig. 7, the blood pressure of the human body is composed of diastolic blood pressure and systolic blood pressure. There are also two systolic pressures in one cycle. The change in blood pressure changes smoothly due to the cushioning action of the artery made of muscle. In order to model this, it is necessary to use the variable pressure supply device 10 according to the present invention. The output pressure of the virtual blood pressure generator 8 according to the embodiment of the present invention can also be output so as to be divided into the virtual diastolic blood pressure and the virtual systolic blood pressure. At this time, the virtual diastolic blood pressure is set to a background pressure basically formed in the fluid 14 saturated in the variable pressure supply device 10, and the virtual systolic blood pressure is formed in the variable power applied in the power device 100, It is smoothly changed by the elastic body 180 and can be output so as to have at least one, preferably two virtual systolic blood pressure, in one cycle, like the actual blood pressure.

<Performance test method of blood pressure monitor>

8 is a flowchart of a blood pressure monitor performance test method according to an embodiment of the present invention. As shown in FIG. 8, the blood pressure monitor performance test method may include a pressure supply step S100, an output pressure detection step S200, an output pressure correction step S300, and a test step S400.

The pressure supply step S100 is a step of supplying pressure to the model arm 800 with the variable pressure supply device 10 mentioned above.

The output pressure detecting step S200 is a step of detecting the output pressure of the model arm 800 at the second sensor unit 820 connected to the model arm 800. [

The output pressure correction step S300 may be performed by controlling the power unit 100 so that the output pressure of the model arm 800 has a predetermined pressure value or pressure pattern or changing the type, . At this time, the control of the power unit 100 can be performed by the control unit 520 or the second control unit 860.

In the test step S400, the model arm 800 is connected to the blood pressure monitor, and the blood pressure value measured by the blood pressure meter is compared with the output pressure of the model arm 800 to test or correct the blood pressure monitor.

At this time, the output pressure of the model arm 800 may be expressed as similar to the body blood pressure as mentioned above.

< Variation example >

The variable pressure supply device according to an embodiment of the present invention can be first used in evaluating the characteristics of various biomaterials such as blood pressure monitor performance test mentioned above. Second, it can be used as a liquid feed for fuel in plants and fuel cells. Third, it can be used as a supply of fluid in the above-mentioned inkjet nozzle injection technique. Fourth, it can be used as a fuel supply injector device in a device using a fluid fuel engine such as an automobile.

The configurations of the elastic body 180 and the variable pressure supply device 10 described above are not limited to the drawings and are preferably determined according to the use of the variable pressure supply device 10. [

As described above, those skilled in the art will appreciate that the present invention may be embodied in other specific forms without departing from the spirit or essential characteristics thereof. It is therefore to be understood that the above-described embodiments are to be considered in all respects only as illustrative and not restrictive. The scope of the present invention is defined by the appended claims rather than the detailed description, and all changes or modifications derived from the meaning and scope of the claims and their equivalents should be construed as being included in the scope of the present invention.

8: Virtual blood pressure generator
10: Variable pressure supply
14: Fluid
100: Power unit
120: Piston rod
122: piston
140: Cylinder
142: pressure delivery pipe
144: Output stage
160: pressure plate
180: elastic body
300: Nozzle
320: 1st orifice
340: fluid supply pipe
360: One Way Valve
500: first sensor unit
520:
800: Models
820:
860:

Claims (15)

A variable pressure supply apparatus for supplying various types of variable pressures to an output end,
An electric or hydraulic power unit generating variable power;
A piston having a rear end connected to the power unit and linearly reciprocatingly supplied with the variable power;
A cylinder located at one end of the power unit and having a piston therein, the cylinder being saturated with fluid;
A pressing plate which is pressurized or depressurized by the piston, and configured inside the cylinder;
At least one elastic body formed in the cylinder and configured to buffer the variable power transmitted to the pressing plate through the pressing plate to form a buffer pressure inside the cylinder; And
A pressure transmission pipe having one end connected to the cylinder and the other end connected to the output end, the inside saturated with the fluid, and the buffering pressure being transmitted to the output end;
And a variable pressure supply device.
The method according to claim 1,
Wherein the output end is a nozzle structure including a first orifice at an end thereof,
And a fluid supply pipe for supplying the fluid to the pressure transfer pipe so that the saturated state of the fluid is maintained.
3. The method of claim 2,
And a one-way valve provided between the fluid supply pipe and the pressure transmission pipe, the flow rate of the fluid being controlled.
The method according to claim 1,
A first sensor unit for detecting the buffering pressure formed on the output terminal or the pressure transmission pipe; And
A control unit for controlling the variable power of the power unit so that the buffering pressure has a preset pressure value or a pressure pattern;
And a variable pressure supply device.
The method according to claim 1,
Wherein the elastic body is made of a synthetic resin material having elasticity, has a space therein, and includes a fluid in the space.
The method according to claim 1,
Wherein the elastic body is composed of at least one coil spring,
One side of the coil spring is welded to a pressure plate pressed by the piston,
And the other side of the coil spring is welded to one side of the cylinder.
The method according to claim 6,
Wherein the elastic body is a shock absorber composed of a combination of a spring and an oil damper.
A variable pressure supply method for supplying various types of variable pressure to an output end,
A power applying step of applying power to the power unit;
Wherein the piston is connected to the power unit and is supplied with variable power, the piston is located in a linear motion direction of the piston, and the pressure plate is provided in the cylinder saturated with the fluid, A pressure supply step of transmitting the variable power to the pressure plate;
A buffering step of transmitting the variable power transmitted to the pressing plate to the elastic body and buffering the transmitted variable power to form a buffer pressure on the fluid saturated inside the cylinder; And
A pressure output step in which the buffering pressure buffered in the elastic body is transmitted to the output end through a pressure transfer tube saturated with the fluid;
/ RTI &gt;
9. The method of claim 8,
A pressure detecting step of detecting the buffering pressure in a first sensor unit for detecting the buffering pressure formed at the output end or the pressure transmission pipe;
A control step of controlling the variable power of the power unit to adjust the cushioning pressure to a preset pressure value or a pressure pattern, the control unit controlling the variable power of the power unit or changing the elastic body;
Repeating the step so that the buffering pressure has a predetermined pressure value or pressure pattern;
Further comprising the steps of:
A virtual blood pressure generator for testing the performance and accuracy of a blood pressure monitor,
A variable pressure supply device according to claim 1; And
A model arm provided at an output end of the variable pressure supply device;
A virtual blood pressure generator
11. The method of claim 10,
A second sensor part connected to the model arm and detecting an output pressure of the model arm applied by a buffering pressure formed at an output end of the variable pressure supply device; And
A second control unit for controlling variable power of the power unit, which is a constitution of the variable pressure supply unit, such that the output pressure has a preset pressure value or a pressure pattern;
Further comprising:
12. The method of claim 11,
The model arm is formed of elastic synthetic resin material,
At least one cylindrical tube made of elastic synthetic resin is provided inside the model arm,
Wherein the fluid conduit opening of the tube is open and the terminating end is closed.
13. The method of claim 12,
The output pressure is divided into a virtual diastolic blood pressure corresponding to diastolic blood pressure of the human blood pressure and a virtual systolic blood pressure corresponding to the systolic blood pressure of the human blood pressure,
Wherein the virtual diastolic blood pressure is the output pressure to be applied to the model arm when the power diaphragm does not provide variable power in the power device as a constituent of the variable pressure supply device,
Wherein the virtual systolic blood pressure is generated when the power device provides the variable power and the variable power is applied to the model arm by a buffer pressure formed by buffering in an elastic body constituting a component of the variable pressure supply device, And,
Wherein the output pressure has at least one virtual systolic blood pressure in one cycle.
A variable pressure supply device according to any one of claims 1 to 4, wherein the variable pressure supply device is connected to a model arm, and power is applied to the variable pressure supply device to apply an output pressure applied by a buffering pressure formed at an output end of the variable pressure supply device A pressure supply step;
An output pressure detecting step of detecting the output pressure of the model arm at a second sensor unit connected to the inside of the model arm;
Wherein the output pressure of the model arm is controlled so as to have a predetermined pressure value or a pressure pattern, or to control the variable power of the power unit, which is a constitution of the variable pressure supply unit, or to change an elastic body which is a constituent of the variable pressure supply unit step; And
A test step of connecting the model arm to a blood pressure monitor and comparing or measuring the blood pressure measured by the blood pressure monitor with the output pressure of the model arm to test or correct the blood pressure monitor;
And a blood pressure monitor. 15. The method of claim 14,
The output pressure is divided into a virtual diastolic blood pressure corresponding to diastolic blood pressure of the human blood pressure and a virtual systolic blood pressure corresponding to the systolic blood pressure of the human blood pressure,
Wherein the virtual diastolic blood pressure is the output pressure applied to the model arm when the power device does not provide variable power,
Wherein the virtual systolic blood pressure is generated when the power device provides the variable power and the variable power is the output pressure applied to the model arm by the buffer pressure formed by buffering in the elastic body,
Wherein the output pressure has at least one hypothetical systolic blood pressure in one cycle.

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